The overpower of Bone Spear is Blighted Marrow Rune rather than Masquerade set. Devs may observe the PTR Ladder, Undoubtedly, all players have chosen Blighted Marrow Rune to improve their grades for rank, which proves that the overpower is not set but Blighted Marrow Rune. Actually,other runes of Bone Spear never strong.
Masquerade of the Burning Carnival:
Bone Spear cast by you and your Simulacrums deals 9000% increased damage, previously 5500%(PTR). Simulacrums gain triple this bonus.
Blighted Marrow rune of Bone Spear:
Damage is increased by 8% for each enemy Bone Spear passes through.previously 15%.